I'm contemplating selling my mac pro and changing to a retina macbook due to portablility. It's the 2010 model, 6-core 3.33 Ghz. I've upgraded RAM to 10GB, and added 2 3TB HD's as well as a 60GB SSD. It also has approx. 14 months of apple care left. I have an estimate around $3000 but im not sure how fair that price is.